Teacher: Shaynamae B.
Ybanez Grade level: 8
Lesson: Stages of Meiosis
Time: 1 hour
I. OBJECTIVES:
A. Content Standards The learners demonstrate an understanding of:
➢ 1. how cells divide to produce new cells
➢ 2. meiosis as one of the processes producing genetic variations of
the Mendelian Pattern of Inheritance
B. Performance The learners shall be able to:
Standards ➢ present an analysis of the data gathered on diseases resulting from
nutrient deficiency
C. Learning Learning Competency:
Competencies and The learners should be able to…
Objectives compare mitosis and meiosis, and their role in the cell-division cycle;
Objectives:
At the end of the lesson, the students should be able to:
• Describe the different stages of meiosis.
• Know the differences and similarities between mitosis
and meiosis.
ELICIT: Access prior knowledge Student’s Activity
Students will be divided into four groups and given the names
Prophase, Metaphase, Anaphase, and Telophase. When the 1. Metaphase
teacher's description refers to them, the group will say "that’s 2. Prophase
us." The description are as follows: 3. Telophase
1. During this stage, the sister chromatids line up at the center 4. Anaphase
of the cell. M 5. Interphase
2. Chromatin condenses into chromosomes or double stranded
sister chromatids. P
3. Spindle disappears and the nucleus reforms around each set
of chromosomes. T
4. The sister chromatids are pulled apart by the shortening of
the spindle fibers. A
5. Cell spends most of its time in this phase, and during this
time it grows, replicates its chromosomes, and prepares for cell
division. I
Follow up Questions:
1. What are the certain types of cells that undergoes Mitosis? 1. Autosomes
Knowing that we humans are multicellular, do you think that 2. No
all type of cell in the body have the same function? 3. No, reproductive cells undergo
3. Can all of them divide through the process of mitosis? meiosis.
Once the students answer the following questions, the teacher
will mention about reproductive cells that are produced through
the process of meiosis.
ENGAGE: Get the students’ minds focused on the topic.
The Teacher will show a family
picture and ask a student to share to
the class what he/she observed
about it in terms of their physical
appearance.
Key Question. Anticipated answer:
• How come you don’t look
Because of the different
exactly like your parents?
combinations of these genes.
EXPLORE: Provide students with a common experience.
Students will perform the activity
“Assess, Match, and Arrange”. The
activity aims to let the students label the
picture that best represents a specific
stage in the process of meiosis I. After
doing so, they will have to arrange it
chronologically.
EXPLAIN: Allow the learners to construct an explanation.
The teacher may provide some information to increase the
accuracy of student responses.
The teacher will ask one (1) group to present their activity to
the class. The students will try to synthesize and describe the
happenings in each stage.
Guide Questions:
1. Do you think that the stages in meiosis 1 is exactly the same 1. No
as the mitosis? 2. In the Metaphase and
2. What certain stage in meiosis 1 has resemblance and/or Anaphase, the mechanism is
difference in the stages involved in mitosis? almost the same as in mitosis.
However, instead of chromatids
After the presentation of their answers, the teacher will give being pulled apart, the sister
inputs on important concepts that may be missed by the chromatids of homologous
students. The teacher will then further explain the topic through chromosomes remains intact.
PowerPoint Presentation.
There are two Stages in Meiosis, the Meiosis I and the Meiosis
II.
Meiosis 1 includes:
Prophase 1 - The chromosomes in this phase begin to pair off
as homologous. Crossing-over takes place during this stage.
Metaphase 1 - The paired chromosomes arranged themselves
in the equatorial plate.
Anaphase 1 - Spindle fibers form and attach to the centromeres
of the chromosomes. They attach to the centromeres of the
chromosomes. Sister chromatids remain together.
Telophase 1 - Chromosomes have successfully reach their
respective poles. Cytokinesis follows and produces 2 haploid
cells.
Meiosis 2 includes:
Prophase 2 - Chromosomes condense and the nuclear envelope
breaks down.
Metaphase 2 - The chromosomes line up individually along the
metaphase plate.
Anaphase 2 - The sister chromatids separate and are pulled
towards opposite poles of the cell.
Prophase 2 - Nuclear membranes form around each set of
chromosomes, and the chromosomes decondense. Cytokinesis
splits the chromosome sets into new cells, forming the final
products of meiosis: four haploid cells in which each
chromosome has just one chromatid.
Right after the whole process, there are four cells produced. In
the initial step, there are two pair of chromosomes. We now
only have 2 chromosomes. So, what would happen next in the
circle of life is that if these four cells became sperm cells, then
they would fertilize an egg. A new organism would arise
through the process of mitosis.
ELABORATE: Apply knowledge to new domain/context.
Now that the students have learned the two (2) types of cell
divisions, the teacher will let them complete the table to show
the difference and similarities of mitosis and meiosis.
EVALUATE: Deepen conceptual understanding through use
in new context. Practice the transfer of learning.
The students will take the short quiz about today’s discussion
through google form. The questions are as follows:
Direction: Choose the letter of the correct answer to the
following questions.
1. Meiosis does NOT include
a) gamete formation
b) production of diploid cells
c) two cell division phases
2. What do mitosis and meiosis have in common?
a) They both include phases of prophase, metaphase,
anaphase, and telophase.
b) They both involve crossing over.
c) They both produce haploid cells.
3. Which description of meiosis is INCORRECT?
a) Centromeres divide and chromatids separate in
anaphase II.
b) Crossing over occurs during prophase I.
c) Homologous line up together in metaphase II.
4. During meiosis II:
a) each cell containing 46 chromatids yields two cells,
each with 23 chromosomes
b) each cell containing 92 chromatids yields four cells,
each with 46 chromosomes
c) each cell containing 92 chromatids yields two cells,
each with 46 chromosomes
5. When does "crossing over" occur?
a) Prophase 1
b) Metaphase 1
c) Anaphase 1
Direction: Identify whether the following statements are True
or False.
1. There is an interphase stage between Meiosis 1 and
Meiosis 2.
2. Chromatids are pulled away by the spindle fibers
during Anaphase 1.
3. The paired chromosomes arranged themselves in the
equatorial plate during Metaphase 1.
4. There is no crossing over that's going to happen in
Prophase
5. The cells that are produced through the process of
meiosis are destined to be gametes.
EXTEND
Assignment
1. What can happen if Meiosis goes wrong?
Resources:
https://www.khanacademy.org/science/ap-
biology/heredity/meiosis-and-genetic-diversity/a/phases-of-
meiosis
https://www.youtube.com/watch?v=_-jyj8_FxqQ&t=378s
